Upright multi-layer container



Feb. 24, 1970 HIDEO SAGARA ET AL 3,497,100

UPRIGHT MULT I-LAYEH CONTAINER Filed Jan 25, 1968 INVENTOR. ammo SAGARA,TSUTOMU 00E United States Patent 3,497,100 UPRIGHT MULTI-LAYER CONTAINERHideo Sagara, 530-8, Kogokitamachi, and Tsutomu 00c, 1152804Itsukaichimachi Saekigun, both of Hiroshima Prefecture, Japan Filed Jan.25, 1968, Ser. No. 700,413 Claims priority, application Japan, Jan. 31,1967, 42/ 6,207 Int. Cl. F17c 13/00 U.S. Cl. 2203 7 Claims ABSTRACT OFTHE DISCLOSURE The invention described in this application relates to anupright, multi-layer container comprising a steel plate wound around theexternal circumference of the upper end of an end plate, thiscombination being welded to the 1ower-end surface of a rnulti-layercylinder, the steel plate being welded to the end plate, and a metalmember in support of the body of the container and secured to said steelplate.

BRIEF SUMMARY OF THE INVENTION This invention relates to an uprightmulti-layer container. In the case of such a container of a large sizeconsisting of a multi-layer cylinder and a semi-spherical end platewelded to the cylinder, it is difficult to secure a support metal memberto the multi-layer cylinder, since it is made up of many layers of thinsteel or band steel. Therefore, the end plate is composed of asingle-layer of steel and a deposited steel member is padded on theupper end portion thereof to form a flange portion or the upper endportion may be formed by a spherical-surface ring of forged steelprovided with a flange so that a support metal member may be secured tosaid flange portion, for example, a skirt portion may be welded to saidflange portion, which procedure has already been well known. However, inthe case of a container of this well known art wherein a stress taxed onsaid flange portion in support of the container may be distributedwidely on the end plate so as to avoid any excessive concentrated stressthereon, it is necessary to form the base portion of said flange portioninto a small gradient thus requiring too much pad of a deposited ironmember or a thick ring of forged steel of a large size, thus making themanufacture of the container very expensive as an unavoidable drawback.

An object of the present invention is to provide an upright, multi-layercontainer free of such drawbacks as those mentioned above.

Another object of the invention is to provide an upright, multi-layercontainer wherein a steel plate is wound around the externalcircumference of the upper-end portion of an end plate welded to thelower end of a multilayer cylinder, the steel plate being welded bymeans of deposited iron members to the cylinder and to the end plate anda support metal member in support of the body of the container, forexample, a steel skirt member is welded to said steel plate. Accordingto the present invention, it is rendered sufiicient to weld only theexternal circumference of the upper-end portion of the end plate and thenarrow beveling portion of said steel plate thereby saving on the amountof deposited iron members, Therefore, this manufacturing procedure isvery easy to carry out without using any expensive and large-sizematerial of forged steel, as compared with the formation of a flangewith the padding of deposited iron members on the external circumferenceof the end plate as specified or required in the case of containers ofthe prior art.

Still another object of the invention is to provide an upright,multi-layer container wherein an end plate of a smaller thickness isemployed than that of a multi-layer cyl nder and said end plate isWelded to the multi-layer cyhnder, together with a steel plate wound onthe external circumference of the end portion of the end plate andwelded thereto. According to the present invention therefore, it ispossible that the greater part of weight of the multi-layer container besupported by the steel plate d rectly welded to the end portion of theend plate without giving any excessive stress on the end plate therebypermitting the manufacture of highly dependable containers. Stillanother object of the present invention is to provide an upright,multi-layer container wherein at least either a steel plate or depositedsteel members for welding said steel to the end plate is made of ductilesteel with a yield point lower than the end plate. This arrangement Willcertamly make the welding operation very easy and be effect1ve inpreventing any excessive concentrated stress on the end plate. Otherobjects, characteristics and effect of the present invention will becomemore apparent from the following description, with reference to theembodiment shown in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view of anupright large-size multi-layer container, with a part thereof exposed invertical cross section. FIG. 2 is an enlarged view of the jllIlCtlOIlportion between the multi-layer cylinder, end plate and support metalmember of FIG. 1.

DETAILED DESCRIPTION In accordance with FIG. 1, there are indicated themultilayer container for high-pressure purposes generally at numeral 1,its end plate at 3 welded to the end portion of the multi-layer cylinder2 and the skirt member at 10 in vertical support of the container.

In carrying out the manufacturing operation, the steel plate 5 is Woundaround the external circumference of the upper end portion 4 of thelower end plate 3 and then welded thereto by means of a deposited ironmember 6 for integral combination. Subsequently, the end plate is causedto confront the lower-end surface of the cylinder 2 and both members arewelded together by means of deposited steel members 7 and 8 to completethe formation of the multi-layer container 1. Again subsequently, theskirt member 10 for supporting the container is welded to the externalcircumference of the steel plate 5 by means of a deposited steel member9.

For example, said steel plate 5, and deposited steel members 6, 8, 9,have tensile strength of about 3545 kg./mm. And said cylinder 2, saidend plate 3, and deposited steel member '7 have tensile strength of morethan about 60- kg./mm.

The upright multi-layer container thus formed is such that the yieldpoint and yield ratio of the steel plate 5 and deposited iron members 6,8 and 9 are made lower than those of the cylinder 2 and end plate 3 andmoreover, the lower end of the deposited iron member 6 is formed into asmall gradient so that the iron plate 5 gives no excessive concentratedstress on the end plate 3 and the greater part of Weight of thecontainer 1 can be transmitted to the skirt member 10 whereas only onepart thereof is transmitted to the end plate 3 thus presenting themanufacturing procedure to be all the more safe in practical use.

According to the present invention, after the deposited steel members 6,'7 and 8 have been welded in place, the welded portions can be subjectedto some heat treatment to remove residual stress or improve the qualityof the material thereof and thus it is possible to confirm thesatisfactory completion of the container by testing and then the skirtmember 10 can be welded to the steel plate by means of the depositedsteel member 9, thus making the manufacturing operation very simple.

What is claimed is:

1. An upright container comprising an end plate (3) having an upper endportion (4), a multi-layer cylinder (2) having a lower-end surface, theend plate being of a smaller thickness than that of the multi-layercylinder, a steel plate wound around the external circumference of theupper end portion of said end plate, the steel plate being welded to theend plate, the upper end portion and the steel plate confronting thelower-end surface of the cylinder and being welded thereto, and a metalmember in support of the body of the container and being secured to saidsteel plate.

2. An upright container comprising an end plate (3) having an upper endportion (4), a steel plate (5) wound around the external circumferenceof said upper end portion and welded thereto, a multi-layer cylinder (2)having a lower-end surface, the end plate having its upper end portionwith the steel plate confronting the lower end surface of the cylinderand Welded thereto, and a metal support means (10) welded to the steelplate.

3. An upright container as claimed in claim 2, said steel plate beingmade of ductile steel with a yield point lower than that of said endplate.

4. An upright container as claimed in claim 2, the steel plate beingwelded to the upper end portion by a deposited steel member (6) ofductile steel with a yield point lower than that of said end plate.

5. An upright container as claimed in claim 2, the end plate being of asmaller thickness than the multi-layer cylinder.

6. An upright container as claimed in claim 5, the steel plate (5) beingwelded to the upper end portion by a deposited steel member (6) and tothe lower-end surface of the cylinder 2) by a deposited steel member(8), the metal support means (10) being welded to the steel plate by adeposited steel member (9), the upper end portion being welded to thelower-end surface by a deposited steel member (7).

7. An upright container as claimed in claim 6, deposited steel members(6), (8), (9), and steel plate (5) being ductile and having a yieldpoint lower than those of the cylinder and the end plate.

References Cited UNITED STATES PATENTS 2,962,182 11/1960 Rossheirn 220693,268,103 8/1966 Nelson 220-3 FOREIGN PATENTS 172,469 1/ 1935Switzerland.

RAPHAEL H. SCHWARTZ, Primary Examiner US. Cl. X.R.

